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Heat and Mass Transfer

Heat and Mass Transfer
The unit of overall coefficient of heat transfer is

kcal/m hr °C
kcal/hr °C
kcal/m²
kcal/m² hr °C

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Heat and Mass Transfer
The concept of overall coefficient of heat transfer is used in heat transfer problems of

Conduction and convection
Conduction
Radiation
Convection

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Heat and Mass Transfer
Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, ρ = Density of substance, S = Specific heat, and k = Thermal conductivity)

h = kρ/S
h = k/ ρS
h = ρS/k
h = S/ρk

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Heat and Mass Transfer
Radiation is the process of heat transfer in which heat flows from a ________, in a straight line, without affecting the intervening medium.

Hot body to cold body
Smaller body to larger body
Cold body to hot body
Larger body to smaller body

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Heat and Mass Transfer
When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by

Conduction
Conduction and convection
Convection
Radiation

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Heat and Mass Transfer
The heat is transferred by conduction, convection and radiation in

Melting of ice
None of these
Boiler furnaces
Condensation of steam in condenser

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MORE MCQ ON Heat and Mass Transfer

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